.chat-box{
    width: 100%;
    height:200px;
    border: 2px solid blue;
    border-radius: 10px;
    background-color: white;
    overflow-y: auto;
}
.chat-box>p.me{
    color:red;
}
.chat-box>p.other{
    color:blue;
    text-align: right;
}